Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old July 27th 12, 06:37 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Oct 2009
Posts: 707
Default UK earthling - was: Dipole-2 different wire sizes?


"Rob" napisał w wiadomości
...
Szczepan Bialek wrote:
From Maxwell's time all circuits are closed. So sometimes the current
must
flow in the air. Of course sometimes is enough if only part flows in the
air. It is the leakage.
At HF the leakage is rather large.


But today we know that this is not true.

"A great deal of analytical and experimental work has been done over the
past 100 years on the design and performance of ground systems for
verticals. "
And in summary: "Depending on the character of the soil, it is possible
there may be some increase in soil conductivity as we go up in frequency
which might compensate a bit. "

"The purpose of the radial system is to divert current from the soil into
the radial conductors which have very low loss compared to soil. We can
calculate the current division between a radial system and the soil ".From:
http://www.kkn.net/dayton2004/HF_ver...6LF_Dayton.pdf

For me the current between the radial and soil (or air) is the leakage:

Is at HF the leakage rather large?

S*.


  #2   Report Post  
Old July 27th 12, 06:49 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jun 2006
Posts: 1,898
Default UK earthling - was: Dipole-2 different wire sizes?

Szczepan Bialek wrote:

"Rob" napisa? w wiadomo?ci
...
Szczepan Bialek wrote:
From Maxwell's time all circuits are closed. So sometimes the current
must
flow in the air. Of course sometimes is enough if only part flows in the
air. It is the leakage.
At HF the leakage is rather large.


But today we know that this is not true.

"A great deal of analytical and experimental work has been done over the
past 100 years on the design and performance of ground systems for
verticals. "
And in summary: "Depending on the character of the soil, it is possible
there may be some increase in soil conductivity as we go up in frequency
which might compensate a bit. "

"The purpose of the radial system is to divert current from the soil into
the radial conductors which have very low loss compared to soil. We can
calculate the current division between a radial system and the soil ".From:
http://www.kkn.net/dayton2004/HF_ver...6LF_Dayton.pdf

For me the current between the radial and soil (or air) is the leakage:


Nope, you have no clue what is actually happening.

Is at HF the leakage rather large?


This is a nonsense question based on a total lack of understading of
what is really happening.



Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Using speaker wire for a dipole KD2AIP Antenna 48 February 25th 19 08:46 PM
80m Dipole fed with open wire feeder. [email protected] Antenna 2 December 29th 08 08:54 PM
Newbie with a wire dipole killdagger CB 27 December 17th 04 10:36 PM
Receiver dipole vs 23 ft wire for HF Ken Antenna 2 April 30th 04 03:41 AM
Long wire vs. G5RV/dipole John Shortwave 10 March 5th 04 03:16 AM


All times are GMT +1. The time now is 09:35 AM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright Š2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017